Chapter 2

Question 1

The study of microscopic plants and animals

Answer 1

Microbiology

Question 2

The study of drugs

Answer 2

Pharmacology

Question 3

Is the smallest unit of ELEMENTS

Answer 3

Atom

Question 4

Substances from which all matter is made

Answer 4

Elements

Question 5

What are the 96% pf the human body is made up of 4 elements

Answer 5

Oxygen (65%)
Carbon (18.5%)
Hydrogen (9.5%)
Nitrogen (3%)

Question 6

Atom’s centre , core of atom

Composed of protons and neutrons

Answer 6

Nucleus

Question 7

Negatively charged particles

Orbit in energy levels around the nucleus

Answer 7

Electrons

Question 8

Is the equal number of protons in an atom’s nucleus

Answer 8

Atomic number

Question 9

The equal to the number of protons and neutrons combined

Answer 9

Atomic mass

Question 10

Elements that have a stable number of electrons in the outer level

Answer 10

Nonreactive elements

Question 11

The number of bonds an atom needs to fill its outermost energy level and become stable

Answer 11

Valence (strength)

Question 12

Form when one atom transfers electrons to another form

Weak

Mixed with water

Answer 12

Ionic bonds

Question 13

Atoms or group of atoms with a positive or negative charge

Answer 13

Ions

Question 14

Atoms that donates an electron

Answer 14

Cation

Question 15

Atom that accepts an electron

Answer 15

Anion

Question 16

Compounds that separate into ions when put in the solution

Answer 16

Electrolytes

Question 17

Form when two atoms share electrons to complete the energy level and thus become stable

Very strong

Most common chemical bond

Doesnt mix well with water

Answer 17

Covalent bond

Question 18

Electrons are shared equally

Answer 18

Nonpolar covalent

Question 19

Electrons are shared unequally

Answer 19

Polar covalent

Question 20

Chemicals composed of two or more atoms held together with covalent bonds only

Answer 20

Molecule

Question 21

Chemicals composed of two or more different atoms held together by ionic or covalent bonds

Answer 21

Compounds

Question 22

A blend of 2 or more substances that retain there individual identities

Answer 22

Mixtures

Question 23

Generally solids that dissolve in a liquid

Answer 23

Solutions

Question 24

Body fluid ph less than 7.35 called

Answer 24

Acidosis

Question 25

Body fluid ph greater than 7.45 called

Answer 25

Alkalosis

Question 26

Chemicals that prevent sharp changes in H concentration Important in maintaning relatively constant ph in body fluids

Answer 26

Buffers

Question 27

Forms of an element that have the same atomic number but different atomic weight

Answer 27

Isotopes

Question 28

Emission of atomic particles from an isotope

Answer 28

Radioactivity

Question 29

Unstable Radiate subatomic particles

Answer 29

Radioactive isotopes

Question 30

Are proteins that accelerate chemical reactions Essential in metabolism

Answer 30

Enzymes